Soft Phones - Installing


  • How do I install the Avaya One-X soft phone client?


  • Oregon State University
  • Employee
  • Telephones
  • Windows

If you are using a Mac, please see: Soft Phone via Citrix


To follow these steps, you will first need to ask Telecom to enable your OSU extension for soft phone access. For more information, see: Soft Phones - About.


Note: these steps require local administrator access to your computer. Also, you must be connected to the OSU VPN before launching the Avaya One-X Communicator; this is true even if you are on-campus.

  1. Browse to:
  2. Download the file
    1. If the computer is Windows 11, please download 
  3. Extract the zipped file to a folder on your computer
  4. Right-click on Setup.exe and choose "Run as Administrator"
    • If on Windows 11 instead of Setup.exe it will be Avaya one-X Communicator Suite.exe
    • You may be prompted to close applications like Outlook and Firefox
    • If you receive an error about .NET, run the file dotNetFx40_Full_x86.exe in the folder you extracted
    • If you receive an error about vcredist or 32-bit apps, run the file vcredist_x86.exe in the folder you extracted
    • If Setup.exe takes too long to install, launch onexc_setup_6.1.8.06_40314.msi instead
    • If an error pops up saying to install Visual C++ 2005 redistributable run vcredist_x86.exe before launching onexc_setup_6.1.8.06_40314.msi.
  5. Enter your local administrator username and password when prompted
  6. If on Windows 11, when it asks for Setup Type choose Custom, then select only Avaya one-X Communicator and click Next
  7. On the setup welcome screen, click Install
  8. When the installer is complete, click Finish
  9. The Avaya One-X Communicator application should start up
  10. If you see a Security Alert message, click Allow access
  11. On the Setup window, select "Telephony Setup" only and click Next (Note, "Telephony Setup" may be grayed out but should still have a check mark next to it)
  12. Select H.323 and click Next
  13. In the Telephony Setup window, enter the following:
    1. Extension: the last 5 digits of your OSU phone number
    2. Password: the last 5 digits of your OSU phone number
  14. Click the Add button and input the appropriate server IP address in the list according to your campus location:
    1. Corvallis:
    2. Bend:
    3. HMSC:
    4. Portland:
  15. Click OK, and then Next
  16. On the Add phones menu, click Next
  17. At the option to "Select phone for placing and receiving calls", select This Computer and click Next
  18. Leave "Enable Emergency Call Handling Feature" checked and "Your extension number" selected; click Next
  19. Click Finish
  20. The Avaya One-X Communicator will shut down
  21. Connect to the OSU VPN
  22. Start the Avaya One-X Communicator
  23. On the login screen, you should see your extension already entered; if the Extension box is empty:
    1. Click on the gear icon and select Settings
    2. Make sure H.323 is selected
    3. Enter your 5-digit OSU extension and password (same as your extension)
    4. Click Add and enter the server based on the options above
    5. Uncheck Enable Video Calls
    6. Click OK
  24. Click Log On
    • If get a "Login Error" message make sure that in Settings -> Login the "Use Avaya one-X Client Enablement Services account" box is unchecked. 
  25. You may see the message "Existing Login Detected" because your desk phone on campus is already signed in to your extension; click Yes

Once you have completed installation, see Soft Phone - Using for help using Avaya One-X.

Uninstall Avaya One-X Communicator

  1. Press Windows key
  2. Enter "Programs" and select "Add or remove programs"
  3. Search for "Avaya" in the list
  4. Click on "Avaya One-X Communicator" and select "Uninstall"
  5. Select Uninstall again when prompted
  6. Enter your local administrator username and password when prompted
  7. The uninstaller will remove the software


For assistance, contact the IS Service Desk.

100% helpful - 1 review
Print Article


Article ID: 101621
Mon 3/16/20 2:42 PM
Thu 12/14/23 9:45 AM

Related Articles (1)